(16) In a musical keyboard, which component is an essential part for controlling the volume of the sound produced?
- (a) Speaker
- (b) Volume knob
- (c) Stand
- (d) Synthesizer module
(17) In a rocket engine, which component is an essential part for expelling high-speed exhaust gases and generating thrust?
- (a) Rocket fins
- (b) Fuel tank
- (c) Nozzle
- (d) Launch pad
(18) In a digital camera, which component is an essential part for adjusting the amount of light that enters the camera’s image sensor?
- (a) Camera strap
- (b) Viewfinder
- (c) Aperture
- (d) Lens cap
(19) In a computer, which component is an essential part for temporarily storing data that the CPU can access quickly?
- (a) Keyboard
- (b) Monitor
- (c) RAM (Random Access Memory)
- (d) Printer
(20) In a bicycle, which component is an essential part for supporting the rider’s weight and providing a comfortable sitting position?
- (a) Chain
- (b) Saddle
- (c) Pedals
- (d) Handlebars
